I'm sorry to burst your bubble and all. :-( I hate saying anything negative but thats my opinion so I felt you should have it from my side of things. You still have a pretty awesome stocking list though, shouldn't be hard to find another fish.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.